Locking-switch movement



(No Model.)

- J. T. POWERS. v

LOGKING SWITGH MOVEMENT. No. 504,502. Patented Sept. 5, 1893.

fly 2.

. NITED STATES PATENT OFFICE.

JOHN T. POWERS, OF WEST SPRINGFIELD, MASSACHUSETTS.

LOCKING-SWITCH MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 504,502, dated September 5, 1893.

Application filed December 29, 1892. Serial No. 456,682- (No model.)

To all whom it may concern.-

Be it known that I, JOHN T. POWERS, a citizen of the United States of America, residing in West Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Looking- Switch Movements, of which the following is a specification, reference being had to the accompanying drawings and letters of reference marked thereon.

. In the drawings, like letters of reference lndicate like parts.

Figure 1 is a plan view of my device, illustratlng the position of the parts while the switch is thrown in one direction. Fig: 2 is an edge view of one of the sliding bars, and Fig. 3 is a plan view of my device illustrating the position of the parts when the switch is thrown in a direction opposite to the position occupied by it when the parts are in the position shown in Fig. 1.

In detail, a indicates the base, I) and c slid-' ing bars, d locking dog, 6 starter, f yoke, h double jaw, i operating rod, and j and la links.

The construction and operation of my device is as follows: A suitable base or plate a is provided, upon which are mounted in suitable guides or ways the sliding bars I? and c, which sliding bars are provided with recesses Z and "m, whose function will be hereinafter described. The sliding bars are preferably constructed of two strips of metal arranged parallel with each other and separated a short distance. Mounted upon the base and sliding in a direction at right angles to the sliding bars, I arrange the locking-dog d and the starting device e, both of which are free to move longitudinally, but are restrained from lateral movement. The ends of the lockingdog are of a thickness greater than the space between the two pieces forming the body of the sliding bars, and the sliding-bar c is provided with a recess 1%, the walls of which recess are V- shaped or inclined as shown in the drawings. The sliding-bar b is provided with two such recesses, Z and Z. The ends of the starter e are of a thickness to pass between the two parts forming the body of the slidingbars, and mounted upon the sliding-bars at the desired position are suitable anti-friction rolls, a, 0,1), mounted on suitable pins or bearings. Anti=friction rolls are also mounted adjacent to the edges of all of the sliding parts of the device. The bell-crank-lever or other switch operating mechanism is connected in a suitable manner with the plate T which is mounted in the free end of the sliding-bar. I), while the detector is connected by suitable mechanism to the ipart s, which is mounted in the end of the sliding-bar c. If now it is desired to throw the switch to a position different from that in which it is locked by the device as illustrated in Fig. 1, the operative lever is thrown to draw the operating rod iin the direction indicated by the arrow, and this operating through the double jaws h mounted upon the center of the yoke f, operates to move the yoke in the same direction, thus drawing by means of the links j and it upon both the sliding-bars b and c. As the sliding-bar I), however, is restrained from longitudinal movement because of the fact that the locking-dog d is in engagement therewith, (its end being within the recess Z) this sliding-bar cannot be moved, but as the sliding-bar c is not locked the result will be that it will be drawn in the direction indicated by the arrow until the end of the locking-dog d is opposite the recess m, at which time the roller 42 mounted in the sliding-bar c is brought into engagement with the inclined end of the starter c, which operates to force the starter e toward the sliding-bar b, causing the incline of the starting-bar at that end which bears against the friction roll 0 mounted in the sliding-bar b to force the sliding-bar 1) forward, thus operating to force the looking-bar cl from its engaging recess in the sliding-bar b and causing the opposite end of the locking-bar d to engage the sliding-bar c in the recess m, thus effectually preventing further longitudinal movement of the slidingbar 0 until it is free to move by disengagement of the locking-bar from said recess, and the sliding-bar b continues to move toward the right until the recess Z in it has reached a position opposite the end of the locking-dog d, at which time the pulley 10 in the sliding bar 11 engages the inclined end of the starter e, forcing it toward the sliding-bar c and causing its end to engage the pulley it, thus operating to start the sliding bar 0 again, and thus forcing the locking-dog out of engagement with it and into. the recess Z in the sliding bar I), at which time the switch will have been thrown to the desired position and the detector-baroperated sufiiciently to indicate the position of the switch, and it will readily be seen that the switch cannot be moved from its position until these sliding-bars have been operated in the reverse direction to that above described, thus providing a simple, easily operative, and positive device for moving and locking the switch in the desired position. In the reverse movement the sliding-bar 0 will first move to the left until the recess m is opposite the lockingbar (I, at which time the pulley n will have forced the starter e toward the sliding-bar b, causing the incline bearing against the pulley p to force the sliding-bar b to the left, thus forcing the locking-bar (1 out of the recess Z" and into the recess m in the sliding-bar 0, thus stopping the sliding-bar 0, but allowing the sliding-bar b to continue to move to the left until the pulleyo engages the starter, forcing it toward the sliding-bar c, and as the pulley 'n is now past the center line of the starter the moving of the starter now operates to force the sliding-bar c to the left, thus forcing the locking-bar out of the recess m and forcing its opposite end into the recess Z, at which time the pulley 0 will have forced the starter back to its normal position as indicated in Fig. 1.

Having therefore described my invention, whatI claim, and desire to secure by Letters Patent, is

1. In combination with a switch mechanism, the combination of a base, two sliding-bars arranged therein, a locking-bar operating substantially at right angles therewith and engaging the slidiug-bars alternately, and a starter arranged to start the sliding-bars alternately, each sliding-bar in turn operating through the starter to force the opposite one forward, substantially as shown.

2. In combination with a switch, a suitable base, two sliding-bars b, 0, arranged thereon, the sliding-bar I) having two locking recesses land Z and the sliding-bar 0 having a locking-recess m, a locking-bar 61 arranged to enter said recesses alternately, and a starter 6 arranged to engage the sliding-bars and start the same alternately, substantially as shown.

3. The combination of a suitable base, sliding-bars b, a, mounted thereon, anti-friction rolls arranged to bear against the edges of said bars, a locking-bar (1 arranged to engage the sliding-bars alternately, and a starter e arranged to start said bars alternately, and antifriction pulleys arranged at the edges of both the starter and lock, substantially as shown.

4. The combination of a suitable base, sliding-bars b, c, mounted thereon, a yoke fconneoted in its central portion with an operating rod 1', links in, connecting the yoke and sliding-bars, a locking-bar (Z adapted to lock one bar as it releases the other, and a starter 6 arranged to start said bars alternately, substantially as shown.

JOHN T. POWERS.

WVitnesses:

ALLEN WEBsTER, DANIEL E. LEARY. 

